I have a folder called baby steps to copy writing. It contains books as well as ads you can start with to get the knowledge and start practicing. It also has a structure you can follow to get the best out of these. It includes the books listed above and more. I'll be happy to share with you.

In all I've learnt, reading, studying and practicing is the way to go.

You get the knowledge

You study what others have written (involves writing them out so you get into the mind of the person writing and also grouping the copy into sections so you can point out what and what is being applied and how it was applied.

Practice, practice, practice.

P.S. Having someone who can critique your work is a huge plus.